The doctrine and Chilean jurisprudence has exposed through the time varied arguments tending to affirm that, of the article 915 of the clvil code, emanates the action claiming against the mere holder and simple detainer. due to the discord of such arguments with some articles of the clvil code, it is necessary clarify if really is a legitimate action with livelihoods legal or rather comes to protect unfair situations that do not have an effective solution through the traditional actions.